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Promethium
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Terbium
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Promethium
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Terbium
Physical Properties of Promethium and Terbium
Promethium
Terbium
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Summary
Periodic Table
Facts
Uses
Physical
Chemical
Atomic
Mechanical
Magnetic
Thermal
All
1 Physical
1.1 Melting Point
1,042.00 °C
1,356.00 °C
Francium
▶
⊕
27
3410
1.2 Boiling Point
3,000.00 °C
3,123.00 °C
Flerovium
▶
⊕
147
5660
1.3 Appearance
1.3.1 Physical State
Solid
Solid
1.3.2 Color
Unknown
Silvery White
1.3.3 Luster
Metallic
Metallic
1.4 Hardness
1.4.1 Mohs Hardness
NA
NA
Cesium
▶
⊕
0.2
8.5
1.4.2 Brinell Hardness
NA
677.00 MPa
Cesium
▶
⊕
0.14
3490
1.4.3 Vickers Hardness
NA
863.00 MPa
Palladium
▶
⊕
121
3430
1.5 Speed of Sound
NA
2,620.00 m/s
Thallium
▶
⊕
818
16200
1.6 Optical Properties
1.6.1 Refractive Index
NA
NA
Mercury
▶
⊕
1.000933
1.7229
1.6.2 Reflectivity
NA
NA
Molybdenum
▶
⊕
58
97
1.7 Allotropes
✔
✘
✔
✘
1.7.1 α Allotropes
Not Available
Not Available
1.7.2 β Allotropes
Not Available
Not Available
1.7.3 γ Allotropes
Not Available
Not Available
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